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The museum posted an apology on the Facebook event page called "Hangar 9 New Year's Eve." In part, it says "We have rounded up all of the lost items that we have found and we invite anyone who may have lost a coat or other item to come to the museum (Friday) between 9 a.m. and 5 p.m."

Joe Perez, a Hangar 9 New Year's Eve Party staff member and former Chiefs player, also e-mailed a statement to KMBC 9 News late Thursday. In it, Perez said, "We would like to thank everyone who came out to celebrate and show their support."

The e-mail continued:

"Some of the staff and volunteers did however encounter issues beyond their control, which resulted in some of our guest having less than exceptional experience. We never intended to provide anything less to our guests at one of Kansas City's most amazing venues. We are currently receiving feedback and learning of issues that some of our guests encountered. We are working collectively and diligently to address each of them."

The museum posted on Facebook that an investigation is underway and asked for patience. The museum also posted that people with lost items can call (816) 421-3401 during business hours. Perez said that people can e-mail hangar9event@gmail.com with any other concerns.